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  • Title: Fabrication and investigation of gas sensing properties of Nb-doped TiO(2) nanotubular arrays.
    Author: Galstyan V, Comini E, Faglia G, Vomiero A, Borgese L, Bontempi E, Sberveglieri G.
    Journal: Nanotechnology; 2012 Jun 15; 23(23):235706. PubMed ID: 22595952.
    Abstract:
    Synthesis of Nb-containing titania nanotubular arrays at room temperature by electrochemical anodization is reported. Crystallization of pure and Nb-doped TiO(2) nanotubes was carried out by post-growth annealing at 400°C. The morphology of the tubes obtained was characterized by scanning electron microscopy (SEM). Crystal structure and composition of tubes were investigated by glancing incidence x-ray diffraction (GIXRD) and total reflection x-ray fluorescence (TXRF). For the first time gas sensing characteristics of Nb-doped TiO(2) nanotubes were investigated and compared to those of undoped nanotubes. The functional properties of nanotubular arrays towards CO, H(2), NO(2), ethanol and acetone were tested in a wide range of operating temperature. The introduction of Nb largely improves conductivity and enhances gas sensing performances of TiO(2) nanotubes.
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